Improvement in sectional stbam-geherators



NJFEIERS, PMDTO LITHOGRAPHER. WASHINGTGN n C blinded glatine A. S. CAMERON, 0F, NEW YORK, N. Y.

Letters Patent No. 97,353, dated November 30, 1869.

IMPRO'V'EMENT IN SECTIONAL STEAM-.GENERATORS The Schedule referred to in these Letters Patent and making part or the sam-e.

To all whom tt onu/y concern: l J

Be it known lthat I, A. S. CAMERON, ofthe city, county, and State of New York, have invented a new and useful Improvement in Sectional Steam: Boilers; and I do hereby declare the following to be a full, clear, and exact description thereof, which will enable those'skilled 'in the art to make and use the same, reference being had to the accompanying drawing, forming part of this specification, in which drawingy Figure 1 represents a horizontal section of this invention. l

Figure 2 is a longitudinal vertical section of the same.

Similar letters indicate corresponding parts. This invention relates to the arrangement of a soft-metal packingring, in a groove turned, for that purpose, `into the face of one of the two adjoining heads of a sectional steamfboiler, in such a manner that when the heads are pressed together, a tight joint is formed between the ilat faceof one head and tbe soft-metal ring in the face of the otherhead, and, at the same time, said heads are allowed to accommodate themselves to the expansion and contraction of the tubes connected to them wit-bout producing leaky joints. i

lheheads'at one end of the boiler, however, are provided with annular rims projecting into the holes of the adjoining heads, so that these heads remain firmly in position, while the heads at tbe opposite end of the boiler, being provided with fiat bearingsurfaces, are enabled Ato accommodate themselves to the expansion. and contraction ofthe tubes.

The jointson the bolts which hold the heads together are also rendered tight by soft-metal'rings,

placed into smiling-boxes, through which said bolts extend, and compressed by the action of the nuts and followersbr washers interposed between said nuts and the soft-metal rings.

In the drawingl The 'letter A designates the heads at one end, and the letter A', the heads at the opposite end of a sectional steam-boiler.

The heads A A are connected by the tubes B, which are exposed to the action of a fire built in afurnace, which, however, has no relation to my present improvement, and is not shown in the drawglhe heads/A A are placed side by side, being retained in position and forced up against each other by means of bolts a, which pass-through them in a vertical and in a horizontal direction, as shown.

The joints between -the adjoining surfaces of the beads A are rendered tight by means of soft packingrings b, which are placed into grooves turned. into4 one of the adjoining surfaces, the other surface be 'ing left perfectly dat, so that wbenthe heads are ,drawn together by the action of the screw-bolts ai, a tight joint is produced, and at the same time the heads are free to accommodate themselves to the expansion and contraction of the tubes B without renderingtbe joints leaky.

The joints between the adjoining heads A are formed in the same manner as those between the beads A, with the exception that one of the two ady joining surfaces on said .heads is provided with a rim, j

o, which projects into the hole in the other surface, so that when the screw-bolts are drawn up tight, the heads A' are firmly retainedv in posit-ion, and not allowed to follow the expansion and contraction of the tubes B, since the motion allowed to tbe heads A, on the opposite end of the boiler, is quite sufficient to compensate for tbe expansion and contraction.

On the outer surfaces of the outside heads in each row are placed the covering-plates or caps G, which are provided with stuffing-boxes, (1,. throng-h which pass the screw-bolts a, and into these stnting-boxes are placed soft-metal rings, e, and washers, f, so that by screwing up the bolts, the soft-metal rings will ybe pressed firmly against the circumference of the bolts, and tight joints are produced.

The caps C bear against soft-metal rings, g, placed between them and the outer surfaces of the heads. j

By these means the joints on all parts of my boiler are easily made tight, and the heads A are free to accommodate themselves to the expansion and contraction of the water-pipes, without breaking the joints between them.

The caps C of the hand-holes in the heads are constructe like the caps G,-and they also bear against l soft-me al lings, g.

What I claim as new, and desire to scc-ure by Letters Patent, is-

1. The arrangement of flat surfaces 'on the. heads A, bearing against soft-metal rings placed into grooves4 in the adjoining surfaces, -so as .to allow said heads to accommodate themselves to the expansion and contraction of the tubes, without rendering the joints leaky, substantially as described. i

2. Also, the rims c, on the heads A', in combination with the soft-metal rings interposed between two adjoining heads, substantially asset forth.

A. S. CAll-IER-ON. Witnesses: e W. HAUFF,

E. F. KAsfrnNnUsn. 

